We have a CCR-1036-12 running 6.45.3 (Stable) that we access via the API to print, add and remove /queue/simple

If we have the NAT rules enabled (Even with no traffic going through the router), running the script through PHP will lock up the router for up to a minute. If the NAT rules are disabled then it'll process the script instantly and no affect the router

Is there a known issue that could be affecting our API usage? Other routers running the older API work fine, but this single router has been causing us issues